"This recipe is simple and delicious. I've made it a couple times, and I did make one tweek to the recipe after the first time I made it.
It's much easier to get a good browning on the leeks and endive if you just toss them with olive oil and salt and pepper. I found that pouring the dressing in the packet steams the vegetables and makes it difficult to brown.
I would recommend just doing the olive oil, then after you get them caramelized, pull them out and use the vinaigrette as a dressing. The blue cheese is ingenius. So good."